Speed-indicator for motor-vehicles and the like.



H. P. F. BEHRENS. SPEED INDICATOR FOR MOTOR VEHICLES AND THE LIKE, APPLICATION FILED JULY 6,1911.

1 ,O48,276, v Patented Dec. 24, 1912.

3 S HBETfi-SHEET 1.

Fig.5.

%v r Attvrney. v

Witnesses:

H. P. P. BEHRENS. SPEED INDICATOR FOR MOTOR VEHICLES AND THE LIKE.

APPLICATION FILED JULY 6, 1911.

' Patented De0.24,1912.

a sn zmksunm' 2.

Fig. 5.

Im! ntor: fla /mac h y Attorney,

H. P. E. BEHREN'O. EED INDICATOR FOR MOTOR, VEHICLES AND THE LIKE.

T APPLIOATION FILED'JULY 6, 1911. 1,048,276. O Patented Dec.24,1'912.

J a sums-snfim 3.

i io.

Witnesses: v

O Attormy.

3D I view of the same mechanism and Fig. 5 is a UNITED STATES PATENT OFFICE. T

HEINRICH TETER FRIEDRIG?! BEH'RENS, F PARIS, FRANCE.

SPEED-INDICATOR FOR MOTOR-VEHICLES AND THE LIKE.

Specification of Letters Patent.

Application fi1ed.J'uly s, 1911. Serial are. 637,239.

i speedometer for automobile and other vehiclcs in which the index hand is driven by a roller rolling on a disk traveling at a constant speed, the distances from the center of this disk being proportionate to the speed of the vehicle and the variations of speed being transmitted to this roller by the intermediary of a planet pinion running on a toothed wheel driven by the vehicle. This indicator also comprises a distance meter.

The description which. follows with refer ence to the accompanying drawing will render the construction of this speed indicator jclearly intelligible.

Figure 1 is a diagram explanatory of the operation. Fig. 2 is a front elevation of the mechanism with the casing in section. Fig. 3 is a side elevation of the same mechanism with the casing in section. Fig. 4 is a plan side elevation showing the control of the regulator system. Figs. 6, 7, 8 and 9 illustrate constructionaldetails. Figs. 10, 11, 12 and 13 relate to a modification of the driving mechanism of the apparatus.

The movement of the vehicle or machine is transmitted to the indicator by a shaft 1 with the interposition of a clutch 2 and of the following speed reducing mechanism. A pinion 8 keyed upon the shaft 1 meshes with a wheel 4 upon the shaft of which there is keyed a pinion 5 meshing with a wheel 6 loose upon the shaft 1 and integral with the bevel pinion 7. The latter is detachable in such a manner that it may be changed in accordance with the diameter of the vehicle wheels. 7 I i The system of wheels 1, 2, 3, 4, 5 and 6 which carries the detachable wheel 7 is mountedon a plate 8 which is secured in the box containing the mechanism by means of a nut 8'. This system is able to slide in a slot 59 formed in the bottom 58 of the box 55 in the direction indicated by the arrows F and F so as to permit of adjusting the wheel 7 relatively to the wheel 9.

The

pinion 7 is in mesh with a bevel wheel 9 driving another wheel 10 fast to the shaft 37 by the intermediary of two gearing down pinions 11 and 12. This wheel 10 carries a small snug 13 which at each revolution of the wheel, that is to say, after the vehicle has traversed 100 meters strikes upon a fin -ger 14 integral with a rocking lever 15 carrying a pawl 16 driving the distance meter 17.

;A spring 18 returns the lever .15 int-0 its initial position after the passage of the snug 13. The wheel 9 meshes with a small pinion 19 which transmits its movement to a disk 20 which can be driven at a constant speed by the intermediary of a friction clutch constituted (Figs. 6 and 7) by a spiral spring 21, the central extremity of ,which is attached to the extension 22 of the pinion 19, the end of this spring pressing Patented D 2052 1, 1912.

upon the box 23 keyed upon the shaft 24 upon which the plate 20 is fixed. In order to render the movement absolutely uniform whatever the speed of the pinion 19 and consequently of the vehicle or machine driving the indicator may be the disk 20 is provided with external teeth which mesh with a pinion 25 (Fig. 5) keyed upon a shaft 26 carrying a spur wheel '27 meshing with a pinion 28 controlling a centrifugal governor 29 of any suitable kind; in the governor represented the balls 29 in separating cause a plate 31 to ascend by means of the small rods 30; this plate comes into frictional contact with a bearing screw 32 carried by an angle piece 33. The wheel 10 meshes with a small planet pinion 3 1 keyed on ashaft 35 carried by two parallel arms 36 able to rotate freely on the shaft 37 of the wheels 10 and 9. The shaft 35 carries another pinion 38 meshing with aspur wheel 39 keyed on a small shaft 40 upon which the roller 41 is fixed; this roller runs upon the constant speed plate 20. This plate is covered with and the first numbered wheel/i2 is-keyed.

upon the said shaft so that by rotating this same shaft by means of the knurl 44 the wheel i3 can be given the desired position although the ratchet is lcckedby its pawl. This arrangement presents the advantage of rendering it unnecessary to lift the pawl in order to release the ratchet.

The operation of this apparatus is as follows :-As already explained the shaft 1 driven by the vehicle drives the two toothed wheels 9 and 10 by means of its gears. The

. wheel 9 drives the disk 20; which moves at a constant speed'bwing to the action of the centrifugal governor. The wheel 10 which runs at a speed proportionate to the speed of the vehicle or machine imparts to the planet pinion 3a and consequently to the roller 41 a higher or lower speed by the intermediary or the'pinion 38 and wheel 39. Now for a given speed of the wheel 10 the roller-runs upon a circle oi given radius. If the speed of the wheel 10 should increase, as the roller rotates at a higher speed, it must run upon a circle of larger radius, because the disk 20 always turns at a constant speed. if on the other hand the speed of the wheel 10 is smaller, the roller will run upon a circle of smaller radius. Consequently the roller and the planet pinion '34 that it carries tend to separate more or less from the cen-' ter of the disk 20 and a'given speed of the wheel 10 and of the vehicle corresponds to a given interval from tlie center 0 (Fig. 1). For the different positions that it occupics for the various speeds, the point of con- -taot of the ro1ler-41 does not describe a circle concentric with that of the wheel 10,: that is to say with that of the center of the planet pinion 34:, because its support 45 pivots upon a shaft in line with the shaft 35, in such a manner as to enable the plane of the roller to assume oblique positions as just explained, but, as shown inthe diagrammatic Fig. 1, acurve 46 which is comprised within the circle 10.

In order to guide the and insure its running upon concentric circles, it. is provided with a kind of fork 56 which embraces theshaft 24 of the disk 20.

This' method of guidance also permits the plane of the roller 41 to assume an oblique roller 41 eiiiciently' position upon the radius which joins its point of contact to the center, in such a man nor as to pass obliquely from one circumtci ence to another, during thewariations at speed.

The adherence of theroller il upon the disk 20 is insured by a s ring 57 which he rs upon the end of the siaft 37 uponv hich the frame coi'istituted by the two aru is able to turn freely, this frame serving, as

support for the planet pinion and for the roller fittings and presents some little axial play upon this shaft 37.

In order to permit of recording the pee exactly, a toothed sector 4'1 the cent-1" of which is eccentric relatively to the ar 37 of the wheel 1.0 is connected by a 230$ 45) with the arm 86 whichimparts to it the dis placements effected by the roller 411 and by the shaft 35, so thatv'the first right hand tooth of the said sector 47 describes a curve which coincides almost enact ly with the real curve described by the point of contact of the roller 41 and so that the arcs described by the said tooth are practically equal or proportional to those described by the roller. This toothed sector t? meshes with a pinion 50 which imparts its movement to a small bevel pinion 51 upon the shaft of which the hand 52 is mounted; this hand moves over the dial 53 beneath the glass 5 t in'the boa which contains the whole ofthe mecha nism. I

As will be und rstood, this speed indicza tor might equally well be employed for measuring at any time the speeds of.

running at variable speeds.

Instead of the driving mechanism scribed. at the commencement of the spec ficatio-n the following -device. illustrated h.-

Figs. 13, 11, 12 and 13 might equallywell he ".1 employed.

The driving shaft 1 carries a bevel pinion which meshes with afibevel pinion 6' mounted at the lower part of the apparatus between a fixed plate 62 and a movable plate 62 which'pinion 61 carries a ring o'l th forming a ratchet 63 which acts upon pawl 64 integral with a plate 65 upon which a toothed wheel 66 can be detachably time]. This wheel66 meshes with a small pinion (37 mounted in a sleeve 68 in the interior oi? whicih its shaiit 69 is able to rotate; at its extremity this shaft carries another small pinion 7O meshing with the wheel 9. The

sleeve 68 is carried by an arm 71 which is rockably mounted to rotate around the shaft 37 of the wheel 9 and the said sleeve is able to move in a slot 72 concentric with the s aft 37.

nor as to adapt'the speed indicator to the diameter of the wheels of the vehicle. After the plate 62 has been dismounted it is only This arrangement also permits of changing the multiplication in such a man necessary toremove the wheel 66, to replace it'by one of larger or smaller diameter. .The

sle evefi wit-h1the pinion 67 is then returned? to the proper position for bringing it into mesh'with the fresh wheel-166. When this has been done, the arm 71 is locked by tightening the screw 73': engaged in the slot 74.

I It will be noted-,that the'driving by, this system can take'place in one direction only owin to the form'mf pawl and ratchet interpose between the bevel wheel 61 andthe toothed wheel 66.. f; j

What I and desire to secure by Letters Patent of the United Statesis 1. A speed indicator comprising in combination, a ,disk, means for rotating saidvdisk at a constant speed,'means adapted to move over and contact with the face of said disk,

ind :ating' means, means for operatively connecting said indicating means with said,

, connecting said indicatin means with said contacting means, and driving means for said contacting means comprising a planet wheel, a toothed wheel in engagement therewith and rotating at speeds proportionate to the speeds to be indicated, a frame for said planet wheel consisting of arms capabio of rocking movement, and toothed ro tating means for transmitting the rotation of said wheel to said contacting means.

3. A speed indicator including a constant speed disk and a roller member adapted to move over the face of said disk, a planet pinion, a toot-bed wheel driving said planet pinion, means for operatively connecting saidpinion with said roller member, a shaft for said pinion, a support for said roller member, and a pivot 'for said support located in alinement wlth said pinion'shaft.

constant speed disk mounted thereon, a roller member adapted to move over the face of said disk, means to drive said roller memberat speeds proportionate to the speeds to be indicated, and means to guide said roller member including a iifurcated member'con nected to said roller member and embracing the shaft ,of'said constant speed disk.

5. A speed indicator comprising in con bination, a disk, means for rotating said disk at a constant speed, means adapted to move over and contact with the face of said disk, indicating means, a toothedwheel rotating at speeds proportionate ,to the *catin and riving means for said disk comprising i 4. A speed indicator including a-shaft, a

ning on said toothed wheel, a frame consisting of rockable arms vin which said planet pinion is mounted, a driving connection between said'planet pinion and the contacting means, a, toothed memberadapted to oscillate around an-axis eccentric to that of said toothed wheel, means to transmit the movements of. said frame to said toothed member, and means to transmit the move- -mei1ts of said toothed member-to said indieating means. i

6. A speed indicator comprising in combinat-ion, a disk, means adapted to move over and contact with the face ofsaid disk, indicating means, means for operatively connecting said indicating means with said contacting means, driying means for said contacting means with and rotating at speeds proportionate trifugal governor which regulates said disk for a constant speed. 1

7. Speed indicating and totalizing mechanism, comprising in combination a5-disk,

tact with the face of said disk, indicating mealns, means for operatively connecting said indicating means with saidcontacting means including a toothed-Wheel rotating at speeds proportionate to the speeds to be by said toothed wheel, a pawl actuated by said means, a ratchet, a shaft upon which said ratchet is frictionally mounted and adapted to be driven by'said pawl, a'totalizing Wheel keyed upon. said shaft, and

, reset to, zero without releasing said ratchet from said pawl, by turning said shaft.

8. A speed indicator comprising a disk tact with the face thereof, indicating means, means for operatively connecting said indimeans with said contacting means a bevel pinion driven at the same speed as that to be indicated, a bevel Wheel meshing with said bevel pinion, ratchet teeth on said chet, a toothed wheel operatively connected with said pawl, and gearing-transmitting disk.

including a detachable toothed wheel adapted to be rotated at speeds proportionate to the speeds to be indicated, a second toothed wheel adapted to be driven by said detachable toothed wheel; and a transmission between said two toothed wheels comspeeds to be indic a planet P to the speeds to be indicated, and a conmeans, driving means for said conta mg indicated, totalizer actuating means carried means whereby'the totalizing wheel can be 'bevel -,wheel, a pawl engaging with said rat-' the-movement of said toothed wheel to said:

vso

comprising a planet wheel, a toothed wheel in engagement there means for rotating said disk at a constant speed, means adapted to move over and con-' and means adapted to move over and con- 9. A driving device for a speed indicator prising a shaft mounted in an arm rocka'ble Inwitness whereof, I have hereunto around the shaft of said second toothed signed my name in the presence ei two subwheel, two toothed pinions on said shaft scribing witnesses.

one meshing with the detachable toothed 1131mm PETER 3139 wheel, and the other with said other toothed Witnesses:

Wheel, and means for retaining said arm in H. G. Com

a determined position. 1 GABRIEL BELLXAHZ). 

